Joist form



- 162 ,82 May 3 1927 w. F. HEDBERG 6 3 JoIsT hom;

2 Sheets-Sheet 1 Filed Nov. 22. 19.26

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May 3 1927.

W. Fl HEDBERG J OIS'II` FORM md Nov. 22. 192e ATTORNEY Patented May 3, 1927.

I entren STA WILLIAM F. HEDBER-G, OF KANSAS CITY, AllflISSSOUItI.

JUIST FORM.

Application inea November 22, 192e.

-vide a form oi the above mentioned chai'-,`

aeter that is so constructed that the shoring can remain in place without disturbance ofthe same when the forms are removed, and a orm wherein the minimum amount 'thereof must remain in place when the shoring .is maintained in place and the ree mainder of the form, removed.` This is accomplished by providing so'i'iit menibers that are sectional, small sections being provided 4'above the vposts used tor shoring puiposes that are only slightly larger in area than the tops of the posts, thus .making` it .necessary to keep. onlyth se sections ot the soiiit members in place w ien the `'forms are4 re- --moved prior to removing the shoring. The keepingv of theshoring in place 1s a necesvk sary procedure as the shoring-'must be lett in position untilzthe concrete h as Athoroughly set,' while the forms can `be removed `and 'moved to another place after a much shorter period of time. Accordingly with my arrangement itl is possible to 4use a much smaller numberof forms than would otherwise beiV necessary with any lother form pre- @viously known.y Y' i `It is avlinrtherpurpose ot the invention to provide new .and improved clamping meansftor holding the forms in position in assembling the same and also to provide new and-improved means `for :mounting- ,the

stringers supporting the forms on the posteV constituting the shoring. fr y i Gther objects4 and advantages ot the invention-will appear as the description of the accompanying *drawings proceeds. However, I desire to have it distinctly under stood that I do not intend to limit myselt to theexactl details shown4 or described, but that `I intend to include as part of my in- -vention all such obvious changes and modi-4` fications ot parts as would occur to a person skilled Vin this art and as would fall within i resting upon the {ianges 14 thereof are the the scope ot the claims.

In the drawings:

Fig. l is a perspective view, partly brokerL away.ofli .a concrete floor, showing my improved concrete.

Fig. 2 is a` tragmentary sectional. view o--a floor,'showing my improved form assoforms'in positionfor receiving the` Serial No. 149,954.

cia-ted therewith, portions thereof being shown in spaced relation thereto.

Fig. 3 is a fragmentary perspective view ot a portion ,ofV a `form showing an end closure member therefor, portions thereof being shown as being spaced tromthe form.

Fig. 4 is a transverse sectional view ot the end closure member in position.

Fig. 5 is a'fragmentary plan view of an end portion of a form showing the end closure member in position.

Fig. 6 is a perspective view of a torni clamp, and V l Fig. 7 is a perspective view of a Stringer supporting clamp. i

Referring in detail to the drawings:

My improved concrete form is mounted upon shoring comprising a plurality of postlike members 10 which have the bracket members 1l mounted thereon. Said bracket members are shown more clearly in Fig. 7

and comprise a U-shaped or yoke-like body portion 12 having a vertically extending portion 13 and a horizontally extending {iange 14. The vertically extending portion 13 is provided with a pair otslots 15 adjacent one corner thereof through which a tapered wedge-shaped member 16 is adapted to be projected, said member being driven through the Yslots intoengagemont with a corner ot the post-like member 10 se :is te bite into the same-and hold the bracket member 11 firmly in position thereon.r Extend ing through the oppositely located slots 17 .in the parallelly extending portions ot the imnnloer` 12 are the tapering complemental wedge-shaped members 18 and 19, vthe member 18 having teeth 120 therein engaging with the post-like member 10 uponwhich the member 11 is mounted, the member 18 being'wedged into engagement with the postlike member 10 by means ot the member 19 and the member 19-being held in wedging relation thereto by the member 21 which is projected through the slot 22 in the ilangc lVlounted upon the bracket members 11 and stringers 23. The stringere 23 support the substantially vertically extending members 24 which form the side membersof the j oist Yterms.n The members 24 arev provided with base portions 25 which rest on the stringere 23 and Vwhich* project laterally from the member 24m `opposite directions, formingsired by varying the flanges 2G and 27 on said members 24, the

flanges 27y extending inwardly toward eachf other and the flanges 26 extending outwardly away from each other. Thus eaoh ot the members 24 is ot an elongated inverted T shape. Resting upon the flanges 27 oit' the members 24 and mounted between paired members 24 are the sottit members 28. The upper end portions of themembers 24 are provided with the longitudinally extending members 29'havingthebeveled faces'SO, thusVV providing' overhanging 'grooves adjacent the upper end portionsofthe members 24: The paired members 24 are arrangedilr spaced relation, as will be evidentftronrligs. ll andi 3 and the adjoining members 24 ot' adjoiiny ing'pairs are held in'prop'ei* spacedrela'tion by means of thebracesl'. Said? braces are' connected to one member24'at'one' endth'ereot by means of ai hinge 32and detacl'iably" connected with the other member 24 by means oi adetaehable connection comprising` a strap member 33 formed into aneye and? receiving the tongue 345 ofj the" member 3l, the strap member beingl mountedon the member 24;

The members 3l are preferably alternately arranged longitudinally olfthe members 24." rIhat is, the hinges 'andthe 'straps 331alte'rnate along the length ot each member 24l so that oner member 3l=ishingedfto `one member 24 while the adjoining**memberz 3l is hingedfto the opposite membert24. EngagL ing with the beveled: tacesi'BOA on the memL bers 24' are the oppositelyf beveled e'nds ot the s-pace'c'l'members 36'l w'hieli are'supported by means'of the braces are bridged by! means of the filler or bridgiing member 37 whicli'is in turn supportedfby means ol thelongitudinallt7 extending'member 38 sup Jortedlb'y the braces 31. The dome portion olif the'i'orm is thus formed' by the' members tand 37, and it willbe obvious that the span thereof can be variedv as der the width of the member 37a In' a similarA mzmner, the widtli oit' the joist portions ofl the form oanbe' varied'by varying'the width ofi the memberQS:

The members'QS' are not continuous over the post-lile members lOlbut arey providedy with beveled e'nd portions? 39 spaced fromV the'postflilre members 10,' and sohitmembers 40 having oppositelybeveledend' por-tions; 41 are'n'iountedfupon the post-likememberslO extending only slightly beyond theside Jfaces ot said members l0 so that when theV terms are removed asshownfat'tlieright of Fig. 2, the joist' portionl42 of tlie"con`cr'ete will be supported by thepostLlilie members 1U and tlie'smallfsoftit members 40 will remain in place while all otfher' parts off the fornr can3 be removed. This isr zr distinct advan'b tage; as only verysmall!l blocks: remain inv place upon removal'j o'f-V the" formin addition to the postllikemeinbe'rsl-G,-tlius mak'- 31 and which l' ing it possible to retain the shoring in position withoutwaste of material'used-ory makin'g'the form. Preferably a pairof ribs 43 is provided running` lengthwise ot each of the joist forms and located at the opposite outer faces of the paired'members 24, said ribs beingl formed by securing longitudinally extending members to the outer faces of the member 24and serving to support the braces 3l. Additional braces 44 are preterably mounted between the members 24an'd resting upon the outwardly directed' flanges 26 on the'members 24.l

In the form ot'conorete. construction .shown in the drawings thefjoists run between beams which are 'ot muchheavier construction and: in order to 4close' thel endsof thefspace's: -tween the joists aftthe bea'msgthe endaclosu're" members shown in' detaildn'Figs. 3,'.4andf5 areprovided:Y In order to holdbtheendel'o-l sure membersinv position, the'vertioally extending ribs 45V arev provided at? tlieendsoff the members 24 whielrhave the beveledifaecs 46 with whichI the oppositely beveled.i ribs' 47 on the end closure m'embe1s48'f and 49-A engage. 'Ilhe end closureVIV members' l oom prise f a relatively short memberf'48andia relatively! longer member 49whichfare oppositely.` bev- -eled at' their adjoining; ends'tothus provide" a tight joint at this point,.saidbeveled ends andt the beveled ribs further holding; safidf members 48 and 49ifr'o1n outward movement'. The 1 straps` 50 and' 5l' are providedf om the' member-S48 and49iespe'ctivelyl to hold'ithe'f members 48 and 49/from relative'horizontalr movement-,and the members 25-'=are provided with' projecting: ends 52, tliusv` providing' flanges 53 lvup on which f the `members 481211161549 i rest; Said members 48l and 49s are heldx from inward movement by means' of thev transverselyextending'bars 54and55 Which engage in back of the blocks 56 and' 57i re#4 fsl'ieetivelyv providedon the members 24adja1' centthe membersl43 and 2'5. Illie"membersl 54-"and'55` engage with theverticallyl extending` strips 58 l onv theme'mben 48-and1thefver# tically extending stripsion the member"49,'i as well` as withl the'beveled'stripsfl.

Iii assembling the forms; in` orderftohold the oist formin gf portions thereof'inf proper position, suitablel clamping means-A is= pro vided comprising the horizontally' extend;4 ing,r member' 60 adjustablyf' mounteob onl one? o1 the members' 25 by meansotl thefsorew' 6l extendingthrouglrthe slot 62;-.said menu' ber being adapted' tobe passed through an opening' in the form# ot". a slotl in the eyef member 63 mounted on. the othermember? 24, said member (il) havinga pluraiitv o'f openings therein nfhichim'aybe arranged in staggered` relation andi w'lii'clr are adapte'- ed to receive the w'e'd'ge pini 65 fori' ti'ifii'fl' holding the form in the position sho'wn'in? Figi 2.

Instead of? using# the? form'` of? ola'ap'f de@ v est bevelled mamas scribedabo-ve the clamp sbo-wn in Figs. 1 and 6' may be used, comprising the L-shaped members (56 and 67, the member 6d being aalguflm" ing coss se'ctiollr and the n-lember 6'7 being flat.. rEhe upstandifng portions of the members 66 and 67 engage with the opposite sides of the. members 24 and aref held in clamping relation thereto b y means of tlae wedge pins 68 whiclr are adapted to* be passed through aligning slots 69 and 70" inr the transversely extending portions of the members 66 and 67, the members being ,f ,fnifdedk in their relative movement by means of the Harige' 71 onl the transversely extending; portion of the` member 66 engaging with the top edge portifm of the transversely extending portion of the member 67. .Suit-1 able openings 72 may be provided in the member 66* throng-1li which securing devices may be passed for securing the aprifght portions of the clamping members to the members In taking down the forms the members 31 are first removed as shown at the left of Fig. 2, thus releasing the longitudinally extending members 38. The bracket members 11 are then removed whereupon the members 36 and 37 can be removed. After the members 36 and 37 are removed the clamps are released from the joist portions ofthe form whereupon the members 24 and the members 28 can be removed. The members v/iO are, however, retained in position over the posts 10, thus providing shoring for the floor 73 by supporting the joist portions 42 thereof.

What I claim and desire to secure by Letters Patent is 1. In a joist form, a pair of side members having transversely extending base portions providing inwardly and outwardly directed flanges, a sofiit member supported by said inwardly directed flanges, and braces engaging said outwardly directed flanges.

2. In a concrete form, a pair of substantially vertically extending members having undercut grooves adjacent the upper ends thereof, braces extending between said members, a pair of spaced members having ends engaging said undercut grooves and a filler member bridging the space between said spaced members.

3. In a concrete form, a pair of substantially vertically extending members having undercut grooves adjacent the upper ends thereof, braces extending between said members, a pair of spaced members having bevelled ends engaging said undercut grooves and a filler member bridging the space between said spaced members, said spaced members and said filler member being supported vby said braces.

4. In a concrete form, a pair of substantially vertically extending members, braces extending between said members, a pair of spaced mem-bers, engaging said vertically extendingA members, and a filler member bridging the space between said spaced members.

5'. In a concrete form, a pair of substantially vertically extending members, braces extending between said members, a pair' of spaced members engaging said' vertically extending members, and a filler member bridging the space between said spaced members, each of said braces vbeing hinged to one of said vertically extending members and detachably connected with the other thereof.` j

6'. In af concrete form, paired vertically extending. members having base fianges extending in opposite directions, soiiit members mounted between said paired members and engaging certain of said fianges, braces extending between the vertically extending members of adjoining pairs, apair of spaced members engaging the adjoining vertical members of adjoining pairs and a filler member bridging the space between said spaced members.

7. In a concrete form, paired vertically extending members having base flanges extending in opposite directions, sofiit members mounted between said paired members and engaging certain of said flanges, braces extending between the vertically extending members of adjoining pairs, a `pair of spaced members engaging the adjoining vertical members of adjoining pairs and a filler member bridging the space between said spaced members, said spaced members and said filler member being supported by said braces.

8. In a concrete form, post-like members, paired substantially vertically extending members, means on said post-like members for supporting said vertically extending members, soffit members mounted between said vertically extending members, and sofiit members mounted over the ends of said postlike members.

9. In a concrete form, post-like members, paired substantially vertically extending members, means on said post-like members for supporting said vertically extending members, sofiit members mounted between said vertically extending members, and soifit members mounted over the ends of said postlike members, said last mentioned soliit members extending only slightly beyond said post-like members.

10. In a concrete form, paired substan tially vertically extending members and end closure members for said forms extending between said vertical members, means for holding said end closure members in horizontal alignment and means for holding said end closure members against inward movement.

11. In a concrete form, paired substanlac tially vertically extending members and end closure members tor said forms extending between said vertical members, said closure members and vertical members having engaging bevelled rib members thereon, means lor holding said end closure members in horizontal alignment and means for holding said end closure members against inward movement.

12. ln a joist form, a pair oit side members having transversely extending base portions providing inwardly vdirected flanges, a soilit member supported by said flanges, and clamping means therefor comprising a member having a horizontally extending portion provided with a plurality of openings, a member engaging',` therewith and a wedge member insertable in an appropriate one of said openings to hold sai-d members in clamping position.

13. In a joist term, a pair oi' side members having transversely extending base port-ions providing inwardly directed flanges, and clamping means therefor comprising a member having a horizontally extending portion 2 provided with a plurality of openings, a loop member engaging therewith and a wedge member insertable in an appropriate one of said openings to hold said members in clamping position.

lll. In a joist form, a pair of side members having transversely extending base portions providing inwardly directed flanges, a soflit member supported by said 'flanges and Clamping means therefor Comprising a pair` ot angular members having upstandmg portions engaging opposite sides of said form. and transversely extending portions having openings therein and wedging means insertable in'an appropriate pair of said openings to hold said membersl in Clamping position.

ln testimony whereof l affix my signature.

WiLLIAM F. HEDBERG. 

